Police discovered a sophisticated grow operation Tuesday in the 1800 block of Kagehiro Drive, where authorities found 475 mature marijuana plants that would have yielded about $240,000 of street-level marijuana, officers said. Authorities also found grow equipment and a bypassed power line, which caused an estimated loss of more than $30,000 to Pacific Gas and Electric Co., police said. Hai Truong Nguyen, 31, who has connections to the Tracy and San Jose areas, is wanted in connection with the investigation, authorities said.

In an unrelated incident Tuesday, officers responding to a reported residential burglary said they contacted three suspicious people in the 1600 block of Smokey Lane. Xi Hong Chen, 28, Jimmy Zhaoming Tang, 21, and Yueyang Liang, 22, all of San Francisco, were arrested when they were found in possession of a large quantity of marijuana.

A search of the residence the men were targeting showed signs of another large marijuana-growing operation, police said. Authorities obtained a search warrant and found another highly sophisticated, multistage grow yielding about 800 marijuana plants in different stages of maturity. The plants could have produced about $400,000 worth of street-level marijuana, police said. A bypassed power line in the home resulted in an estimated loss of $20,000 to PG&E, authorities said.

On Wednesday, police searched a home in the 3700 block of Norfolk Drive. Inside, officers discovered a marijuana-growing operation partially set up, authorities said. Eighty-five marijuana plants were seized, police said. Ahn The Ngo, 29, and Hieu Cong Nguyen, 19, are wanted in connection with the case, authorities said. Both have ties to the San Jose area, police said.